I was using my spring boot 3.2.4 app on Win 10 and Win Server 2019 and it worked fine. I know my architecture of the app is not good, but it worked. After I had to migrate to Ubuntu 24.04…
I'm currently learning Java and I'm trying to deploy a simple project to WildFly 28.0.1.Final but I'm encountering a problem. The project contains only three classes (HelloServlet, Sentence, SentenceRepository) and uses MySQL 8.0.33. I'm writing the code with Java 11.…
The read file is that: public ArrayList<Aventura> readFile(){ ArrayList<Aventura> aventures = new ArrayList<>(); try{ AventuraDAO aventuraDAO=new AventuraDAO(); AventuraManage aventuraManage=new AventuraManage(aventuraDAO); Gson g=new Gson(); JsonReader reader=new JsonReader(new FileReader("Files/adventures.json")); Aventura[] ave=g.fromJson(reader, Aventura[].class ); if (ave.length==0){ System.out.println("The file should be empty"); ArrayList<Aventura> aventures2…
Getting a NullPointerException Error when trying to run my app, I will link code and Logcat error below, help would be greatly appreciated. In my XML class with the DrawerLayout I have the ID for the drawer set to drawer_layout…
everyone! I am writing unit tests for the mobile app. But I have an error that I don't know how to solve. The error has the following form: java.lang.NullPointerException at androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:841) at androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:806) at androidx.appcompat.app.AppCompatDelegateImpl.findViewById(AppCompatDelegateImpl.java:630) at androidx.appcompat.app.AppCompatActivity.findViewById(AppCompatActivity.java:223) at com.example.projectMP3.SplashScreenActivityTest.testLaunchOfNewActivity(SplashScreenActivityTest.java:14) at…
I have the following error in android studio, And the problem is when adding products because if there is no product, it opens the shopping bag, but when adding one and wanting to re-enter it, it closes and when you…
I'm developing app to load PDF file into new PDF activity from Webview using intent & PdfViewer.jar library. I know it is not possible to open PDF files in Webview but trying to open in activity_pdf.xml When i click link…
Anytime my MainActivity restarts because of changing of dark mode and i try to click i get nullpointer exception. The error is below I have a BaseFragment lateinit var mContext:Context lateinit var mActivity:Activity var myId = "" val firebaseMethods: FirebaseMethods…
Using Array and not ArrayList. User has to write the exact number of data that is provided by the array. The error that I get is NullPointerException, For example, if my array Dinfo and array Linfo has 1, i only…